Title :
Application of a pseudo-3D modeling to Lamb waves generation by a surface-bonded apodized transducer: Experimental results
Author :
Assaad, Jamal ; Moulin, Emmanuel ; Leyla, Najib Abou ; Grondel, Sébastien ; Jenot, Frederic ; Baouahi, Mustapha
Author_Institution :
OAE Dept., Univ. of Valenciennes & Hainaut Cambresis, Valenciennes
Abstract :
The objective of this paper is to predict the ultrasonic field radiated by piezoelectric transducers with finite dimensions in an isotropic plate. This prediction allows a good understanding of physical phenomenon of Lamb wave propagation used on the Integrated Structural Health Monitoring System. In order to describe correctly the radiated field, the stress field in the length direction of the transducer has been supposed to have a parabolic shape. The displacement field generated at the surface of an aluminum plate by a surface-mounted PZT transducer excited by a 5-cycle, Hanning-windowed sinusoid signal, has been measured for different directions, using a laser interferometer. Experimental and numerical results are successfully compared.
Keywords :
condition monitoring; materials testing; piezoelectric transducers; structural engineering; surface acoustic wave transducers; surface acoustic waves; Hanning-windowed sinusoid signal; Integrated Structural Health Monitoring System; Lamb waves generation; PZT; aluminum plate; displacement field; isotropic plate; laser interferometer; piezoelectric transducers; pseudo-3D modeling; surface-bonded apodized transducer; surface-mounted PZT transducer; Aluminum; Laser excitation; Monitoring; Piezoelectric transducers; Shape; Signal generators; Stress; Surface emitting lasers; Surface waves; Ultrasonic transducers; Lamb wave; Structural Health Monitoring;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0175
